Here's a studying that found that tachistoscope training (used in speed reading programs) improve the visual spatial span and reading word accuracy for children with dyslexia. The tachistoscope flashes words briefly on a screen.
We have noticed that children who have developed a sufficient fund of knowledge with recognition can improve their reading fluency or speed with rapid reading techniques. This is a small study, but certainly makes sense with what is known about the biology of plasticity in the nervous system. Do you have any experiences with dyslexia and speed reading? If so, please share them. There are some fairly inexpensive computer based programs ($50) using the tachistoscope technique, but we aren't personally familiar with the programs.